1: # The LearningOnline Network with CAPA
2: # The LON-CAPA group sort handler
3: # Allows for sorting prior to import into RAT.
4: #
5: # $Id: groupsort.pm,v 1.59 2007/07/12 19:54:43 albertel Exp $
6: #
7: # Copyright Michigan State University Board of Trustees
8: #
9: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
10: #
11: # LON-CAPA is free software; you can redistribute it and/or modify
12: # it under the terms of the GNU General Public License as published by
13: # the Free Software Foundation; either version 2 of the License, or
14: # (at your option) any later version.
15: #
16: # LON-CAPA is distributed in the hope that it will be useful,
17: # but WITHOUT ANY WARRANTY; without even the implied warranty of
18: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19: # GNU General Public License for more details.
20: #
21: # You should have received a copy of the GNU General Public License
22: # along with LON-CAPA; if not, write to the Free Software
23: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
24: #
25: # /home/httpd/html/adm/gpl.txt
26: #
27: # http://www.lon-capa.org/
28: #
29: ###
30:
31: package Apache::groupsort;
32:
33: use strict;
34:
35: use Apache::Constants qw(:common);
36: use GDBM_File;
37: use Apache::loncommon;
38: use Apache::lonlocal;
39: use Apache::lonnet;
40: use LONCAPA();
41:
42: my $iconpath; # variable to be accessible to multiple subroutines
43: my %hash; # variable to tie to user specific database
44:
45:
46: sub update_actions_hash {
47: my ($hash) = @_;
48: my $acts=$env{'form.acts'};
49: my @Acts=split(/b/,$acts);
50: my %ahash;
51: my %achash;
52: my $ac=0;
53: # some initial hashes for working with data
54: foreach (@Acts) {
55: my ($state,$ref)=split(/a/);
56: $ahash{$ref}=$state;
57: $achash{$ref}=$ac;
58: $ac++;
59: }
60: # sorting through the actions and changing the global database hash
61: foreach my $key (sort {$achash{$a}<=>$achash{$b}} (keys %ahash)) {
62: if ($ahash{$key} eq '1') {
63: $hash->{'store_'.$hash{'pre_'.$key.'_link'}}=
64: $hash->{'pre_'.$key.'_title'};
65: $hash->{'storectr_'.$hash{'pre_'.$key.'_link'}}=
66: $hash->{'storectr'}+0;
67: $hash->{'storectr'}++;
68: }
69: if ($ahash{$key} eq '0') {
70: if ($hash->{'store_'.$hash{'pre_'.$key.'_link'}}) {
71: delete($hash->{'store_'.$hash{'pre_'.$key.'_link'}});
72: }
73: }
74: }
75: # deleting the previously cached listing
76: foreach my $key (keys(%{ $hash })) {
77: next if ($key !~ /^pre_(\d+)_link/);
78: my $which = $1;
79: delete($hash->{'pre_'.$which.'_title'});
80: delete($hash->{'pre_'.$which.'_link'});
81: }
82: }
83:
84: sub readfromdb {
85: my ($r,$resources)=@_;
86:
87: my $diropendb =
88: "/home/httpd/perl/tmp/$env{'user.domain'}_$env{'user.name'}_sel_res.db";
89:
90: # ----------------------------- diropendb is now the filename of the db to open
91: if (tie(%hash,'GDBM_File',$diropendb,&GDBM_WRCREAT(),0640)) {
92: &update_actions_hash(\%hash);
93:
94: my %temp_resources;
95: foreach my $key (keys(%hash)) {
96: next if ($key !~ /^store_/);
97: my ($url) = ($key =~ /^store_(.*)/);
98: $temp_resources{$hash{'storectr_'.$url}}{'url'}=$url;
99: $temp_resources{$hash{'storectr_'.$url}}{'title'}=
100: &Apache::lonnet::gettitle($url);
101: }
102:
103: # use the temp, since there might be gaps in the counting
104: foreach my $item (sort {$a <=> $b} (keys(%temp_resources))) {
105: push(@{ $resources },$temp_resources{$item});
106: }
107:
108: if ($env{'form.oldval'}) {
109: my $res = splice(@{$resources},$env{'form.oldval'}-1,1);
110: if ($env{'form.newval'} == 0) {
111: # picked 'discard'
112: my $url = $res->{'url'};
113: delete($hash{'storectr_'.$url});
114: delete($hash{'store_'.$url});
115: } else {
116: splice(@{$resources},$env{'form.newval'}-1,0,$res);
117: }
118: }
119: # store out new order
120: foreach my $which (0..$#$resources) {
121: my $url = $resources->[$which]{'url'};
122: $hash{'storectr_'.$url} = $which;
123: }
124: } else {
125: $r->print('Unable to tie hash to db file');
126: }
127: untie(%hash);
128: }
129:
130:
131:
132: sub cleanup {
133: if (tied(%hash)){
134: &Apache::lonnet::logthis('Cleanup groupsort: hash');
135: unless (untie(%hash)) {
136: &Apache::lonnet::logthis('Failed cleanup groupsort: hash');
137: }
138: }
139: return OK;
140: }
141:
142: # -------------------------------------------------------------- Read from file
143:
144: sub readfromfile {
145: my ($r,$resources)=@_;
146: my $cont=&Apache::lonnet::getfile
147: (&Apache::lonnet::filelocation('',$env{'form.readfile'}));
148: if ($cont==-1) {
149: $r->print('Unable to read file: '.
150: &Apache::lonnet::filelocation('',$env{'form.readfile'}));
151: } else {
152: my $parser = HTML::TokeParser->new(\$cont);
153: my $token;
154: while ($token = $parser->get_token) {
155: if ($token->[0] eq 'S') {
156: if ($token->[1] eq 'resource') {
157: if ($env{'form.recover'}) {
158: if ($token->[2]->{'type'} ne 'zombie') { next; }
159: } else {
160: if ($token->[2]->{'type'} eq 'zombie') { next; }
161: }
162:
163: my $name=$token->[2]->{'title'};
164: $name=~s/ \[\((\d+)\,($LONCAPA::username_re)\,($LONCAPA::domain_re)\)\]$//;
165: my $note;
166: if ($1) {
167: $note = '<br />'.&mt('Removed by ').
168: &Apache::loncommon::plainname($2,$3).', '.
169: &Apache::lonlocal::locallocaltime($1);
170: }
171: $name=~s/\&colon\;/\:/g;
172: push(@{$resources}, {'url' => $token->[2]->{'src'},
173: 'title' => $name,
174: 'note' => $note,
175: 'id' => $token->[2]->{'id'},});
176: }
177: }
178: }
179: }
180: }
181:
182: # --------------------------------------------------------- Read from bookmarks
183:
184: sub readfrombookmarks {
185: my ($r,$resources)=@_;
186: my %bookmarks=&Apache::lonnet::dump('bookmarks');
187: # the bookmark "hash" is just one entry
188: # it's a javascript program code with arguments like ('title','url');
189: my @bookmarks=($bookmarks{'bookmarks'}=~/\((?:\'([^\']+)\'\,\'([^\']+)\'|\"([^\"]+)\"\,\"([^\"]+)\")\)\;/g);
190: for (my $index=0;$index<($#bookmarks+1)/2;$index++) {
191: if ($bookmarks[$index*2+1]) {
192: my $url = $bookmarks[$index*2+1];
193: my $name = $bookmarks[$index*2];
194: $name =~ s/^LON\-CAPA\s+//;
195:
196: push(@{$resources},{'url' => $url, 'title' => $name});
197: }
198: }
199: }
200:
201: # ---------------------------------------------------------------- Main Handler
202: sub handler {
203: my $r = shift;
204:
205: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
206: ['acts','mode','readfile','recover','bookmarks']);
207: # color scheme
208: my $fileclr = '#ffffe6';
209: my $titleclr = '#ddffff';
210:
211: &Apache::loncommon::content_type($r,'text/html');
212: $r->send_http_header;
213: return OK if $r->header_only;
214:
215: # finish_import looks different for graphical or "simple" RAT
216: my $finishimport='';
217: my $begincondition='';
218: my $endcondition='';
219: if (($env{'form.readfile'}) || ($env{'form.bookmarks'})) {
220: $begincondition='if (eval("document.forms.groupsort.include"+num+".checked")) {';
221: $endcondition='}';
222: }
223: if ($env{'form.mode'} eq 'simple' || $env{'form.mode'} eq '') {
224: $finishimport=(<<ENDSMP);
225: function finish_import() {
226: opener.document.forms.simpleedit.importdetail.value='';
227: for (var num=0; num<document.forms.groupsort.fnum.value; num++) {
228: $begincondition
229: opener.document.forms.simpleedit.importdetail.value+='&'+
230: escape(eval("document.forms.groupsort.title"+num+".value"))+'='+
231: escape(eval("document.forms.groupsort.filelink"+num+".value"))+'='+
232: escape(eval("document.forms.groupsort.id"+num+".value"));
233: $endcondition
234: }
235: opener.document.forms.simpleedit.submit();
236: self.close();
237: }
238: ENDSMP
239: } else {
240: $finishimport=(<<ENDADV);
241: function finish_import() {
242: var linkflag=false;
243: for (var num=0; num<document.forms.groupsort.fnum.value; num++) {
244: $begincondition
245: insertRowInLastRow();
246: placeResourceInLastRow(
247: eval("document.forms.groupsort.title"+num+".value"),
248: eval("document.forms.groupsort.filelink"+num+".value"),
249: eval("document.forms.groupsort.id"+num+".value"),
250: linkflag
251: );
252: linkflag=true;
253: $endcondition
254: }
255: opener.editmode=0;
256: opener.notclear=0;
257: opener.linkmode=0;
258: opener.draw();
259: self.close();
260: }
261: ENDADV
262: }
263:
264: # output start of web page
265: my $js = <<END;
266: <script type="text/javascript">
267: function insertRowInLastRow() {
268: opener.insertrow(opener.maxrow);
269: opener.addobj(opener.maxrow,'e&2');
270: }
271: function placeResourceInLastRow (title,url,id,linkflag) {
272: opener.mostrecent=opener.newresource(opener.maxrow,2,opener.escape(title),
273: opener.escape(url),'false','normal',id);
274: opener.save();
275: if (linkflag) {
276: opener.joinres(opener.linkmode,opener.mostrecent,0);
277: }
278: opener.linkmode=opener.mostrecent;
279: }
280: $finishimport
281: function selectchange(val) {
282: var newval=0+eval("document.forms.groupsort.alt"+val+".selectedIndex");
283: orderchange(val,newval);
284: }
285: function move(val,newval) {
286: orderchange(val,newval);
287: }
288: function orderchange(val,newval) {
289: document.forms.groupsort.oldval.value=val;
290: document.forms.groupsort.newval.value=newval;
291: document.forms.groupsort.submit();
292: }
293: </script>
294: END
295: # read pertinent machine configuration
296: my $domain = $r->dir_config('lonDefDomain');
297: $iconpath = $r->dir_config('lonIconsURL') . "/";
298:
299: my @resources;
300:
301: if ($env{'form.readfile'}) {
302: &readfromfile($r,\@resources);
303: } elsif ($env{'form.bookmarks'}) {
304: &readfrombookmarks($r,\@resources);
305: } else {
306: &readfromdb($r,\@resources);
307: }
308:
309: my $ctr = 0;
310: my $clen = scalar(@resources);
311: if (($clen > 1) || ($env{'form.readfile'}) || ($env{'form.bookmarks'})) {
312: my %lt=&Apache::lonlocal::texthash(
313: 'fin'=> 'Finalize order of resources',
314: 'ci' => 'Continue Import',
315: 'cs' => 'Continue Search',
316: 'fi' => 'Finish Import',
317: 're' => 'Recover Checked',
318: 'ca' => 'Cancel',
319: 'co' => 'Change Order',
320: 'ti' => 'Title',
321: 'pa' => 'Path',
322: 'in' => 'Include'
323: );
324: my $title = ($env{'form.recover'}) ? 'Recover Removed Resources'
325: : 'Sort Imported Resources';
326: $r->print(&Apache::loncommon::start_page($title, $js));
327:
328: $r->print(<<END);
329: <form method='post' action='/adm/groupsort' name='groupsort'
330: enctype='application/x-www-form-urlencoded'>
331: <input type="hidden" name="fnum" value="$clen" />
332: <input type="hidden" name="oldval" value="" />
333: <input type="hidden" name="newval" value="" />
334: <input type="hidden" name="mode" value="$env{'form.mode'}" />
335: <input type="hidden" name="readfile" value="$env{'form.readfile'}" />
336: <input type="hidden" name="bookmarks" value="$env{'form.bookmarks'}" />
337: <input type="hidden" name="recover" value="$env{'form.recover'}" />
338: END
339:
340: $r->print(&Apache::loncommon::inhibit_menu_check('input'));
341: # ---
342:
343: if ($env{'form.recover'}) {
344: $r->print(<<END);
345: <input type="button" name="alter" value="$lt{'re'}"
346: onClick="finish_import()" />
347: <input type="button" name="alter" value="$lt{'ca'}" onClick="self.close()" />
348: END
349: } else {
350: # --- Continue Buttons
351: my $resurl =
352: &Apache::loncommon::escape_single(&Apache::loncommon::lastresurl());
353: $r->print(<<END);
354: <b><font color="#888888">$lt{'fin'}</font></b>
355: <input type="button" name="alter" value="$lt{'ci'}"
356: onClick="window.location='$resurl?inhibitmenu=yes&catalogmode=import'" />
357: <input type="button" name="altersearch" value="$lt{'cs'}"
358: onClick="window.location='/adm/searchcat?inhibitmenu=yes&catalogmode=import'" />
359: <input type="button" name="alter" value="$lt{'fi'}"
360: onClick="finish_import()" />
361: <input type="button" name="alter" value="$lt{'ca'}" onClick="self.close()" />
362: END
363: }
364: $r->print("<table border='0'><tr><td bgcolor='#eeeeee'>");
365: $r->print("<table border=0><tr>\n");
366: if (($env{'form.readfile'}) || ($env{'form.bookmarks'})) {
367: $r->print("<td bgcolor='$titleclr'><b>$lt{'in'}</b></td>\n");
368: } else {
369: $r->print("<td colspan='2' bgcolor='$titleclr'><b>$lt{'co'}</b></td>\n");
370: }
371: $r->print("<td colspan='2' bgcolor='$titleclr'><b>$lt{'ti'}</b></td>\n");
372: $r->print("<td bgcolor='$titleclr'><b>$lt{'pa'}</b></td></tr>\n");
373: } else {
374: $r->print(&Apache::loncommon::start_page(undef,$js,
375: {'only_body' => 1}));
376: $r->print(<<END);
377: <form method='post' action='/adm/groupsort' name='groupsort'
378: enctype='application/x-www-form-urlencoded'>
379: <input type="hidden" name="fnum" value="$clen" />
380: <input type="hidden" name="oldval" value="" />
381: <input type="hidden" name="newval" value="" />
382: <input type="hidden" name="mode" value="$env{'form.mode'}" />
383: END
384: $r->print(&Apache::loncommon::inhibit_menu_check('input'));
385:
386: }
387: foreach my $resource (@resources) {
388: $ctr++;
389: my $iconname=&Apache::loncommon::icon($resource->{'url'});
390: if (($clen > 1) || ($env{'form.readfile'}) || ($env{'form.bookmarks'})) {
391: $r->print("<tr><td bgcolor='$fileclr'>");
392: if (($env{'form.readfile'}) || ($env{'form.bookmarks'})) {
393: $r->print(&checkbox($ctr-1));
394: } else {
395: $r->print(&movers($clen,$ctr));
396: }
397: }
398: $r->print(&hidden($ctr-1,$resource->{'title'},$resource->{'url'},
399: $resource->{'id'}));
400: if (($clen > 1) || ($env{'form.readfile'}) || ($env{'form.bookmarks'})) {
401: $r->print("</td>");
402: unless (($env{'form.readfile'}) || ($env{'form.bookmarks'})) {
403: $r->print("<td bgcolor='$fileclr'>".
404: &select_box($clen,$ctr).
405: "</td>");
406: }
407: $r->print("<td bgcolor='$fileclr'>");
408: $r->print("<img src='$iconname' />");
409: $r->print("</td><td bgcolor='$fileclr'>");
410: $r->print($resource->{'title'}.$resource->{'notes'}."</td><td bgcolor='$fileclr'>\n");
411: $r->print($resource->{'url'}."</td></tr>\n");
412: }
413: }
414: if (($clen > 1) || ($env{'form.readfile'}) || ($env{'form.bookmarks'})) {
415: $r->print("</table></td></tr></table></form>");
416: } else {
417: $r->print(<<END);
418: <script type="text/javascript">
419: finish_import();
420: </script>
421: END
422: }
423:
424: $r->print(&Apache::loncommon::end_page());
425:
426: return OK;
427: }
428:
429: # --------------------------------------- Hidden values (returns scalar string)
430: sub hidden {
431: my ($sel,$title,$filelink,$id) = @_;
432: my $string = '<input type="hidden" name="title'.$sel.'" value="'.$title.
433: '" />';
434: $filelink=~s|^/ext/|http://|;
435: $string .= '<input type="hidden" name="filelink'.$sel.'" value="'.
436: $filelink.'" />';
437: $string .= '<input type="hidden" name="id'.$sel.'" value="'.$id.'" />';
438: return $string;
439: }
440:
441: # --------------------------------------- Moving arrows (returns scalar string)
442: sub movers {
443: my ($total,$sel) = @_;
444: my $dsel = $sel-1;
445: my $usel = $sel+1;
446: $usel = 1 if $usel > $total;
447: $dsel = $total if $dsel < 1;
448: my $string;
449: $string = (<<END);
450: <table border='0' cellspacing='0' cellpadding='0'>
451: <tr><td><a href='javascript:move($sel,$dsel)'>
452: <img src="${iconpath}move_up.gif" alt='UP' border='0' /></a></td></tr>
453: <tr><td><a href='javascript:move($sel,$usel)'>
454: <img src="${iconpath}move_down.gif" alt='DOWN' border='0' /></a></td></tr>
455: </table>
456: END
457: return $string;
458: }
459:
460: # ------------------------------------------ Select box (returns scalar string)
461: sub select_box {
462: my ($total,$sel) = @_;
463: my $string;
464: $string = '<select name="alt'.$sel.'"';
465: $string .= " onChange='selectchange($sel)'>";
466: $string .= "<option name='o0' value='0'>".&mt('discard')."</option>";
467: for my $cur (1..$total) {
468: $string .= "<option name='o$cur' value='$cur'";
469: if ($cur == $sel) {
470: $string .= "selected";
471: }
472: $string .= ">$cur</option>";
473: }
474: $string .= "</select>\n";
475: return $string;
476: }
477:
478: # ------------------------------------------------------------------- Checkbox
479:
480: sub checkbox {
481: my $sel=shift;
482: return "<label><input type='checkbox' name='include$sel'".
483: ($env{"form.include$sel"}?' checked="checked"':'').
484: ' />'.&mt('Include').'</label>';
485: }
486:
487: 1;
488:
489: __END__
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